location of most recent character entered into textbox

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Tom Wells - 02 Apr 2004 20:24 GMT

Is there a jscript function that can check the location of text in a textbox
to determine if the text is exceeding the display area of the textbox? For
example: I have a textbox that has maxlength=20. The textbox width is tied
to pixels and not characters so the textbox may be filled after only 15
characters. If the user keeps typing the other 5 characters, the left end
scrolls of screen and is hidden. If the form on the screen is printed then
the printed copy is missing text. If the data is submitted and the same
form is used to display the results then data is hidden from the viewer so
they may approve or process information based on a false interpretation.
The data stored in the database should match the data displayed on the
screen. The legal ramifications that could arise are astounding. If anyone
has a solution for this bit of rampant stupidity from Microsoft I would sure
like to know.

Thanks,
Tom

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bruce barker - 07 Apr 2004 17:16 GMT

no. if its important to not truncate displayed text, don't use pixels, use
points.

-- bruce (sqlwork.com)

> Is there a jscript function that can check the location of text in a textbox
> to determine if the text is exceeding the display area of the textbox? For
[quoted text clipped - 12 lines]
> Thanks,
> Tom

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Lithium - 09 Apr 2004 13:21 GMT

why no --> read the dhtml reference

use createTextRange () and getClientRects() for IExplorer

example
<html><head>><title>Get TextBox Text Width</title></head><body><input id="test" onkeydown="change_YourInput_Width ();" type="text" size="10"></body><script
var YourInput=document.getElementById("test")

var YourInput_StartWidth=YourInput.offsetWidth

function change_YourInput_Width (

    var YourInput_TR=YourInput.createTextRange()
    var ClientRectangle=YourInput_TR.getClientRects ()
    var width=ClientRectangle[0].right-ClientRectangle[0].left+15
    if (width>=YourInput_StartWidth) YourInput.style.width=width

</script></html

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bruce barker - 09 Apr 2004 22:57 GMT

the question was not which characters were selected, but rather which were
visible in the case where the textbox was not large enough to display all
the characters.

-- bruce (sqlwork.com)

> why no --> read the dhtml reference;
>
> use createTextRange () and getClientRects() for IExplorer;
>
> example:
> <html><head>><title>Get TextBox Text Width</title></head><body><input id="test" onkeydown="change_YourInput_Width ();" type="text"

size="10"></body><script>

> var YourInput=document.getElementById("test");
>
[quoted text clipped - 8 lines]
> }
> </script></html

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Lithium - 10 Apr 2004 19:26 GMT

>the question was not which characters were selected, but rather which wer
>visible in the case where the textbox was not large enough to display al
>the characters

>-- bruce (sqlwork.com

Tom Wells question was
Is there a jscript function that can check the location of text in a textbo
to determine if the text is exceeding the display area of the textbox

and yes it is with getClientRects () you get a rectangle of the complete input value and with attributes right and left you ca
calculate the width and if the text width is bigger than the input clientWidth -
THE TEXT IS EXCEEDING THE DISPLAY AREA OF THE TEXTBOX

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Tom Wells - 15 Apr 2004 22:28 GMT

Thanks guys! I'll give it a try and resolve this argument.

> >the question was not which characters were selected, but rather which were
> >visible in the case where the textbox was not large enough to display all
[quoted text clipped - 9 lines]
> calculate the width and if the text width is bigger than the input clientWidth ->
> THE TEXT IS EXCEEDING THE DISPLAY AREA OF THE TEXTBOX.

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location of most recent character entered into textbox

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